XML 57 R42.htm IDEA: XBRL DOCUMENT
v3.8.0.1

COMMITMENTS AND CONTINGENCIES - Additional Information (Details) customer in Thousands | 1 Months Ended | 3 Months Ended | 7 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 30, 2017 USD ($) | Mar. 31, 2018 USD ($) office | Dec. 31, 2017 USD ($) | Mar. 31, 2018 USD ($) office | Dec. 31, 2017 USD ($) customer | Sep. 07, 2017 USD ($)
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Accruals related to guarantees and indemnities |  | $ 0 | $ 0 | $ 0 | $ 0 |
Maximum |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Debt instrument, term (or less) |  | 1 year |  |  |  |
Cybersecurity Incident |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Number of customers impacted | customer |  |  |  |  | 145,500 |
Cybersecurity incident remediation, legal, and other professional costs | $ 87,500,000 | $ 4,100,000 | 76,500,000 |  |  |
Insurance settlements receivable | 0 | 10,000,000 | 35,000,000 | 10,000,000 | $ 35,000,000 | $ 0
Insurance recoveries |  |  |  | 60,000,000 |  |
Proceeds from insurance settlement | $ 0 | $ 35,000,000 | $ 15,000,000 | $ 50,000,000 |  |
Number of state attorneys general offices company is in cooperation with | office |  | 49 |  | 49 |  |
Cybersecurity Incident | United States and Canada |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Number of customers, credit card information accessed | customer |  |  |  |  | 209 |
Cybersecurity Incident | United States |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Number of customers, personal information accessed | customer |  |  |  |  | 182 |
Number of customers, name and partial driver's license information stolen | customer |  |  |  |  | 2,400 |
Cybersecurity Incident | Canada |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Number of customers, personal information accessed | customer |  |  |  |  | 19 |
Cybersecurity Incident | United Kingdom |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Number of customers, personal information accessed | customer |  |  |  |  | 860 |
Free Credit File Monitoring And Identity Theft Protection Offering |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Cybersecurity incident remediation, legal, and other professional costs |  |  |  | $ 50,700,000 |  |
Free Credit File Monitoring And Identity Theft Protection Offering | Selling, General and Administrative Expenses |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Cybersecurity incident remediation, legal, and other professional costs |  | $ 4,100,000 |  |  |  |
Investigation, Remediation, Legal, And Other Professional Services |  |  |  |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Cybersecurity incident remediation, legal, and other professional costs |  |  |  |  | $ 113,300,000 |
Insurance coverage |  | 125,000,000 |  |  |  |
Insurance coverage deductible |  | $ 7,500,000.0 |  |  |  |

X
- Definition Commitments and Contingencies Disclosure [Line Items] + References No definition available. + Details
Name: | efx_CommitmentsAndContingenciesDisclosureLineItems
Namespace Prefix: | efx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Insurance Coverage + References No definition available. + Details
Name: | efx_LossContingencyInsuranceCoverage
Namespace Prefix: | efx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loss Contingency, Insurance Coverage Deductible + References No definition available. + Details
Name: | efx_LossContingencyInsuranceCoverageDeductible
Namespace Prefix: | efx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of Customers, Credit Card Information Accessed + References No definition available. + Details
Name: | efx_NumberOfCustomersCreditCardInformationAccessed
Namespace Prefix: | efx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Customers Impacted + References No definition available. + Details
Name: | efx_NumberOfCustomersImpacted
Namespace Prefix: | efx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Customers, Name And Partial Driver's License Information Stolen + References No definition available. + Details
Name: | efx_NumberOfCustomersNameAndPartialDriversLicenseInformationStolen
Namespace Prefix: | efx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Customers, Personal Information Accessed + References No definition available. + Details
Name: | efx_NumberOfCustomersPersonalInformationAccessed
Namespace Prefix: | efx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of State Attorneys General Offices Company Is In Cooperation With + References No definition available. + Details
Name: | efx_NumberOfStateAttorneysGeneralOfficesCompanyIsInCooperationWith
Namespace Prefix: | efx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Proceeds From Insurance Settlement + References No definition available. + Details
Name: | efx_ProceedsFromInsuranceSettlement
Namespace Prefix: | efx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_InsuranceRecoveries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. + References No definition available. + Details
Name: | us-gaap_InsuranceSettlementsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyLossInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationCaseAxis=efx_CybersecurityIncidentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=efx_UnitedStatesAndCanadaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationCaseAxis=efx_CybersecurityIncidentFreeCreditFileMonitoringAndIdentityTheftProtectionOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationCaseAxis=efx_CybersecurityIncidentInvestigationRemediationLegalAndOtherProfessionalServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |